JP2016038135A - Air conditioner - Google Patents

Abstract

To provide an air conditioner that prevents false detection of an infrared sensor by preventing the infrared sensor from being directly exposed to cold air or hot air blown from an air outlet of an indoor unit.
The control device moves the left and right airflow direction adjustment plates of the infrared sensor so that the airflow of the conditioned air does not hit the infrared sensor when the airflow of the conditioned air rotates to an upward position toward the infrared sensor. Airflow avoidance control for rotating in a first direction different from the direction is performed.
[Selection] Figure 5

Description

  The present invention relates to an air conditioner including a wind direction adjusting device that adjusts a wind direction from an air outlet.

  Conventionally, in an air conditioner that blows conditioned air from an air outlet and air-conditions an indoor space, an infrared sensor that can detect the surface temperature of a room wall or floor surface or the position of a human body is provided on the side of the casing of the indoor unit. There is something provided. Such an infrared sensor has a configuration in which a tip portion protrudes from the surface of the housing in order to detect temperature at a wide angle (see, for example, Patent Document 1).

JP 2012-42184 A

  In such a conventional air conditioner, when the air direction adjusting device provided at the air outlet adjusts the air direction toward the direction of the infrared sensor, cold air or hot air directly hits the infrared sensor, and the temperature of the infrared sensor itself Changes. Then, there is a problem that the reference value for temperature detection of the infrared sensor is shifted, and the temperature cannot be detected accurately.

  The present invention has been made to solve the above-described problems, and prevents false detection of the infrared sensor by preventing the infrared sensor from being directly exposed to the cold air or hot air blown from the air outlet of the indoor unit. The purpose is to provide an air conditioner.

  An air conditioner according to the present invention is made to solve the above-described problems, and includes an indoor heat exchanger that generates conditioned air, a blower that supplies indoor air to the indoor heat exchanger, and conditioned air. An infrared sensor provided on the side of the air outlet, left and right wind direction plates provided at the air outlet for adjusting the horizontal wind direction, upper and lower wind direction plates for adjusting the vertical wind direction, left and right wind direction plates and upper and lower wind direction plates An air conditioner having a control device for controlling a rotation angle, wherein the control device causes the air flow of the conditioned air to flow when the vertical airflow direction plate rotates to an upward position where the airflow of the conditioned air faces the infrared sensor. Airflow avoidance control is performed by rotating the left and right wind direction plates in a first direction different from the direction of the infrared sensor so as not to hit the infrared sensor.

  According to the air conditioner of the present invention, it is possible to prevent erroneous detection of the infrared sensor by preventing the infrared sensor from being directly exposed to the cold air or hot air blown from the outlet of the indoor unit.

It is a perspective view of the indoor unit provided with the wind direction adjustment apparatus which concerns on Embodiment 1. FIG. It is a longitudinal cross-sectional view of the indoor unit provided with the wind direction adjustment apparatus which concerns on Embodiment 1. FIG. 2 is a block diagram showing a control system of the indoor control device according to Embodiment 1. FIG. 1 is an exploded perspective view of an outdoor unit for an air conditioner according to Embodiment 1. FIG. It is a flowchart which shows the operation | movement at the time of the heating operation of the air conditioner which concerns on Embodiment 1. FIG. It is the top view which showed the direction of the right-and-left wind direction board in the warm-up operation at the time of the heating operation of the air conditioner concerning Embodiment 1. FIG. It is the side view which showed the direction of the up-and-down wind direction board in the warm-up operation at the time of the heating operation of the air conditioner which concerns on Embodiment 1. FIG. It is the top view which showed the direction of the left-right wind direction board at the time of the normal heating operation of the air conditioner which concerns on Embodiment 1. FIG. It is the side view which showed the direction of the up-and-down wind direction board at the time of the normal heating operation of the air conditioner which concerns on Embodiment 1. FIG. It is the top view which showed the direction of the right-and-left wind direction board at the time of the defrost operation of the air conditioner which concerns on Embodiment 1. FIG. It is the side view which showed the direction of the up-and-down wind direction board at the time of the defrost operation of the air conditioner which concerns on Embodiment 1. FIG. It is a flowchart which shows the operation | movement at the time of the heating operation of the air conditioner which concerns on Embodiment 2. FIG. It is the top view which showed the direction of the right-and-left wind direction board at the time of the temperature control OFF operation | movement of the air conditioner which concerns on Embodiment 2. FIG. It is the side view which showed the direction of the up-and-down wind direction board at the time of the temperature control OFF operation | movement of the air conditioner which concerns on Embodiment 2. FIG. 6 is a top view showing directions of left and right wind direction plates during circulator operation of an air conditioner according to Embodiment 2. FIG. It is the side view which showed the direction of the up-and-down wind direction board at the time of the circulator operation | movement of the air conditioner which concerns on Embodiment 2. FIG. 12 is a flowchart showing an operation during cooling operation of the air conditioner according to Embodiment 3. It is the upper side figure which showed the direction of the right-and-left wind direction board at the time of the warming-up operation of the air conditioner which concerns on Embodiment 3, and a normal cooling operation. It is the side view which showed the direction of the up-and-down wind direction board at the time of the warming-up operation of the air conditioner which concerns on Embodiment 3, and a normal cooling operation. It is the top view which showed the direction of the left-right wind direction board at the time of the internal drying driving | running of the air conditioner which concerns on Embodiment 3. FIG. It is the side view which showed the direction of the up-and-down wind direction board at the time of the internal drying operation of the air conditioner which concerns on Embodiment 3. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, it is not limited to the air conditioner of this invention by embodiment described below. For example, in the following description, a wall-mounted air conditioner is described as an example, but the present invention can also be applied to an air conditioner such as a ceiling cassette type or a ceiling hanging type. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
First, a schematic structure of an air conditioner wind direction adjusting apparatus according to Embodiment 1 will be described with reference to FIGS.
FIG. 1 is a perspective view of an indoor unit including a wind direction adjusting device according to Embodiment 1. FIG.
FIG. 2 is a longitudinal sectional view of an indoor unit including the wind direction adjusting device according to the first embodiment.
As shown in FIGS. 1 and 2, the indoor unit 10 has a suction port 11 for sucking room air into the housing on the upper surface, and a rectangular conditioned air outlet 12 is opened on the lower panel 15. .
Further, in the casing of the indoor unit 10, an air filter 22 that filters indoor air taken in from the suction port 11, an indoor heat exchanger 20 (plate fin type), and a blower 23 are sequentially arranged on the air path 19. When the blower 23 is driven, the room air taken in from the suction port 11 is circulated in order in the air passage 19 toward the blowout port 12. The indoor heat exchanger 20 can adopt, for example, a plate fin type, and the blower can adopt a cross flow fan, an axial blower, a sirocco fan, or the like.

The blower outlet 12 is provided with a left and right wind direction plate 16 that bends the blown air in the left and right direction and a vertical wind direction plate 17 that bends in the vertical direction as a wind direction adjusting device.
The left and right wind direction plates 16 are configured such that a plurality of wind direction plates rotate in the same direction by connecting a drive motor (not shown). The left and right wind direction plate 16 allows the user not only to set the right and left wind direction as desired by the remote controller, but also to automatically set the left and right wind direction according to the results of the floor temperature, wall surface temperature, human body position, etc. detected by the infrared sensor 14 described later. can do. Furthermore, a more complicated wind direction can be set by dividing the left and right wind direction plate 16 into a plurality of pieces like the left and right wind direction plate units 16a and 16b.

  The vertical wind direction plate 17 is configured such that a plurality of wind direction plates rotate in the same direction by connecting a drive motor (not shown). The up / down wind direction plate 17 not only allows the user to set the up / down wind direction with the remote controller, but also automatically detects the up / down wind direction based on the detection result of the floor temperature, wall surface temperature, human body position, etc. detected by the infrared sensor 14 described later. Can be set. Moreover, the up-and-down wind direction board 17 blows off in the left and right sides of the air conditioner in different directions by dividing the left and right sides of the air conditioner like the up-and-down wind direction plates 17a and 17b and the up-and-down wind direction plates 17c and 17d. The infrared sensor 14 makes it possible to set a complicated vertical airflow direction according to the results of the detected floor temperature, wall surface temperature, and human body position.

  Further, by using a plurality of vertical wind direction plates such as the vertical wind direction plate 17a and the vertical wind direction plate 17c, the gap between the two vertical wind direction plates 17 is gradually narrowed to increase the wind speed. A diffusion type that gradually widens the gap between the upper and lower wind direction plates 17 can be formed. During heating, the upper and lower airflow direction plates 17a and 17b are turned upward, the blown air is moved again to the suction port 11, the blown air is reheated, and the other upper and lower airflow direction plates 17c and 17d are moved. It can be turned downward to deliver warm air to the living space faster.

  A reception unit (not shown) that receives an infrared signal from a transmission unit of a remote controller (not shown, a remote control device) is provided on the upper front side of the air outlet 12 of the indoor unit 10. Moreover, the transmission part (not shown) which transmits an infrared signal to a remote control is provided in the front side upper part of the blower outlet 12 like the receiving part. The transmitter uses an infrared LED (light emitting die auto).

The indoor unit 10 is provided with a plug 18, and power (commercial power (50/60 Hz)) is supplied from an indoor outlet.
A cable 40 for exchanging information and control between the indoor unit 10 and the outdoor unit 30 (described later) is connected to a predetermined position on the back surface of the indoor unit 10. In one example, the cable 40 is connected to the right corner of the indoor unit 10 when viewed from the back.

The indoor unit 10 includes an indoor temperature sensor 13 (indoor air temperature detection unit) that measures indoor air temperature and a humidity sensor (not shown) that measures indoor air humidity, for example, an indoor air inlet 11. Or in a place where an indoor air flow is created by providing an opening in the side surface of the indoor unit.
The indoor heat exchanger 20 is provided with a tube temperature sensor 21 for measuring the tube temperature of the heat transfer tube.

  In the indoor unit 10, an indoor microcomputer built in an indoor control device that controls the operation of the air conditioner is housed in, for example, an electrical component box (not shown) of the indoor unit 10. A program related to control of the air conditioner is incorporated in the indoor microcomputer.

  And in the indoor unit 10, the infrared sensor 14 which can measure the radiation heat of a floor and a wall, and the temperature of a human body is provided in the front side of the blower outlet 12 which is a rectangular opening. The infrared sensor 14 is disposed on the front lower panel 15a formed on the front side of the air outlet 12 so as to protrude from the surface of the front lower panel 15a. As shown in FIG. 2, the front lower panel 15 a has an inclination that faces upward from the front end of the air outlet 12 opening toward the front side of the indoor unit, and the air passage 19 in the air outlet 12. It is formed gently and continuously.

A drive device (not shown) is attached to the infrared sensor 14 and is configured to be able to detect the room at a wide angle by rotating.
Since the detection part of the infrared sensor 14 is provided in a state of protruding from the front lower panel 15a of the indoor unit 10, it can detect the surface temperature of the installation wall surface of the indoor unit 10 by rotating. ing. Moreover, the infrared sensor 14 can be installed in the one end part, center part, etc. of the front lower panel 15a in the front view of the indoor unit 10, as shown in FIG.

  The indoor control device measures the indoor space temperature (floor temperature, wall surface temperature) in a pseudo manner by the rotation of the infrared sensor 14, and if there is a temperature higher than the ambient temperature, the indoor control device determines the position of the human body. It can be detected as a position.

  The indoor control device senses the human body by the calculation result of the indoor space temperature (floor temperature, wall surface temperature) calculated by the rotation of the infrared sensor 14, the position of the human body, the indoor temperature sensor 13 and the humidity sensor. The sensory temperature can be calculated and the operation of the air conditioner can be controlled.

  In addition, the heat source determined to be a human body can be monitored to determine whether the heat source is moving or stopped, and the amount of activity of the human body can be detected.

  Furthermore, by monitoring the movement of the heat source determined to be a human body, the shape of the user's room can be estimated from the activity range of the human body.

Here, a control system of the indoor control device will be described.
FIG. 3 is a block diagram illustrating a control system of the indoor control device according to the first embodiment.
Signals from the indoor temperature sensor 13, the indoor humidity sensor, the infrared sensor 14, the tube temperature sensor 21 and the like are input to the indoor control device. The indoor control device performs the arithmetic processing as described above by the program of the indoor microcomputer, and controls the blower 23, the left and right wind direction plates 16, the up and down wind direction plate 17, and the like. And it communicates with the outdoor inverter control apparatus 31.

Next, the outdoor unit of the air conditioner according to Embodiment 1 will be described.
FIG. 4 is an exploded perspective view of the outdoor unit of the air conditioner according to Embodiment 1.
As shown in FIG. 4, the outdoor unit 30 of the air conditioner is provided with an electrical box that houses an outdoor inverter control device 31 that can control the operation of the air conditioner and vary the capacity.

  Moreover, the outdoor temperature sensor 33 which measures outdoor air temperature is incorporated. The outdoor temperature sensor 33 is composed of, for example, a thermistor.

  Further, the outdoor unit 30 includes a compressor 32 (which compresses refrigerant, such as a rotary compressor, scroll compressor, reciprocating compressor, etc.) and an outdoor heat exchanger 34 (plate fin type). ), A tube temperature sensor (not shown) for measuring the temperature of the outdoor heat exchanger, a pressure reducing device (not shown), a four-way valve (not shown), and the like are mounted.

  In addition, in order to promote heat exchange between the refrigerant of the outdoor heat exchanger 34 and the air, an outdoor blower 35 that blows outside air to the outdoor heat exchanger 34 is provided. An axial blower is used for the outdoor blower 35.

Next, the operation of the air conditioner according to Embodiment 1 will be described.
FIG. 5 is a flowchart showing the operation of the air conditioner according to Embodiment 1 during the heating operation.
6a is a top view showing directions of the left and right wind direction plates in the warm-up operation during the heating operation of the air conditioner according to Embodiment 1. FIG.
6b is a side view showing the direction of the up and down wind direction plate in the warm-up operation during the heating operation of the air conditioner according to Embodiment 1. FIG.
FIG. 7a is a top view showing the directions of the left and right wind direction plates during the normal heating operation of the air conditioner according to Embodiment 1. FIG.
FIG. 7b is a side view showing the direction of the up and down wind direction plates during the normal heating operation of the air conditioner according to Embodiment 1.
FIG. 8a is a top view showing directions of the left and right wind direction plates during the defrosting operation of the air conditioner according to Embodiment 1. FIG.
FIG. 8b is a side view showing the direction of the vertical wind direction plate during the defrosting operation of the air conditioner according to Embodiment 1.

  The user determines the set temperature A of the indoor space using an operation content setting means such as a remote controller (not shown), transmits it to the indoor unit 10, and starts the operation (set the set temperature A to 24 ° C., for example). .

  When the heating operation is started, the indoor control device sets the upper and lower airflow direction plates 17 in the airflow direction adjusting device provided at the air outlet 12 in step 1 in FIG. 5 as shown in FIGS. 16, the air direction is directed in a direction different from that of the infrared sensor 14 protruding from the front lower panel 15 a of the indoor unit 10, and the room temperature of the room space is detected by the room temperature sensor 13. At this time, the compressor 32 is driven, and the warming-up operation for stopping the air blower 23 or performing a light wind operation to increase the temperature of the indoor heat exchanger 20 is performed.

  The direction different from the infrared sensor 14 is, for example, when the infrared sensor 14 is installed at the right end of the front lower panel 15a in the front view of the indoor unit 10, the right and left wind direction plates 16 are in the wind direction in the front view of the indoor unit 10. Rotate to face the left side. Alternatively, only the left and right wind direction plate units 16b on the infrared sensor 14 side of the left and right wind direction plates 16 may be rotated so that the wind direction is directed to the left side when the indoor unit 10 is viewed from the front.

  For example, when the infrared sensor 14 is installed at the center of the front lower panel 15a in the front view of the indoor unit 10, the left and right wind direction plate units 16a and 16b are respectively connected to the left side in the front view of the indoor unit 10. Rotate to face the right side. Controlling the left and right wind direction plates 16 in this way can avoid the conditioned air from hitting the infrared sensor 14.

  This is because when the left and right wind direction plates 16 are directed in the direction of the infrared sensor 14, the conditioned air having a temperature higher than the room temperature that has passed through the indoor heat exchanger 20 during the warm-up operation soars in the light wind operation and hits the infrared sensor 14. This is because the infrared sensor 14 cannot correctly detect the floor surface temperature and the wall surface temperature.

  Next, in step 2, the indoor control device calculates the sensation temperature B detected by the indoor temperature sensor 13 and the infrared sensor 14 and sensed by the user from the indoor temperature, floor surface temperature, and wall surface temperature, and sets the indoor unit 10. Comparison with temperature A (sensation temperature B is set to 7 ° C., for example).

  Here, for example, when the set temperature A = 24 ° C. and B = experience temperature 25 ° C., it is determined that there is no heating load, the compressor 32 is stopped, the process returns to step 1 and the vertical wind direction plate 17 faces upward, and the left and right wind direction plates The air blower 23 is stopped or operated in a light wind operation while 16 is set to a different wind direction from the infrared sensor 14.

  In addition, when the difference between the set temperature A and the sensible temperature B is the set temperature A> the sensible temperature B as in the example shown here (set temperature A = 24 ° C., sensible temperature B = 7 ° C.), the heating load Is determined to exist, the process proceeds to step 3 to continue driving the compressor 32 and operate the air conditioner.

Next, in step 4, the temperature β [° C.] of the heat transfer tube detected by the tube temperature sensor 21 provided in the indoor heat exchanger 20 is a threshold value α [° C.] (for example, the tube temperature threshold value α is 40 ° C.). It is determined whether or not. If the threshold value α [° C.] has not been reached (β [° C.] <Α [° C.]), the process returns to step 1 and the operation of the blower is stopped or the warm-up operation is continued as a light wind operation.
This is because immediately after the operation of the compressor 32 is started, if the up-and-down air direction plate 17 is turned downward and the air volume of the blower is increased, the indoor heat exchanger 20 is not sufficiently warmed. It is because it feels uncomfortable.

In step 4, when the temperature β [° C.] detected by the tube temperature sensor 21 reaches the threshold α [° C.] (in the case of β [° C.] ≧ α [° C.]), as shown in FIG. 7a and FIG. A normal heating operation is performed so that the blower air reaches the user's feet by increasing the air volume of the blower 23 with the wind direction plate 17 facing downward and the left and right wind direction plates 16 set by the user and directed to an angle specified by the indoor control device. .
At this time, the outdoor inverter control device 31 of the air conditioner performs the heating operation by adjusting the frequency of the compressor 32 while changing the frequency so that the sensible temperature B [° C.] becomes the set temperature A [° C.].

When the normal heating operation is started, the process proceeds to step 6 and the outdoor inverter control device 31 determines whether or not the defrosting operation of the outdoor heat exchanger 34 is necessary. This is because, when the heating operation is continuously performed, frost adheres to the outdoor heat exchanger 34 when the surrounding environment is humid. When frost adheres to the outdoor heat exchanger 34, the air resistance increases and it becomes difficult for the wind to flow through the outdoor heat exchanger 34, and the ventilation efficiency of the outdoor blower 35 is deteriorated, and the outside air and the refrigerant exchange heat. Because it is not possible, the capacity of the air conditioner is reduced.
The necessity of the defrosting operation is determined from each parameter such as the detected outside air temperature, outside air humidity, and the temperature of the outdoor heat exchanger 34.

  When the indoor control device receives the determination that the defrosting operation is necessary from the outdoor inverter control device 31, the indoor control device proceeds to Step 7 and stops or blows the air blower 23, and at the outlet 12 as shown in FIGS. 8a and 8b. The provided vertical wind direction plate 17 is set to face upward, and the left and right wind direction plates 16 are set to direct the wind direction in a direction different from that of the infrared sensor 14. The setting of the direction of the left and right wind direction plates 16 at this time is the same as that in the warm-up operation in Step 1.

  Then, it progresses to step 8 and changes a refrigerant circuit from a heating circuit to a cooling circuit by switching the four-way valve (not shown) provided in the outdoor unit 30, and removes the frost adhering to the outdoor heat exchanger 34. Perform defrosting operation. Then, whether or not the defrosting operation is completed in step 9 is determined from the temperature of the outdoor heat exchanger 34, the defrosting operation elapsed time, and the like. If the predetermined condition is satisfied, the defrosting operation is completed and the process proceeds to step 2. Return.

  In the air conditioner according to the first embodiment, when the warming-up operation or the defrosting operation is performed during the heating operation by controlling the airflow direction adjusting device in this way, the vertical airflow direction plate 17 provided at the outlet 12 is directed upward. By setting the left and right wind direction plates 16 to direct the wind direction in a direction different from that of the infrared sensor 14, the conditioned air that passes through the indoor heat exchanger 20 and has a temperature higher than the room temperature rises in the light wind operation and hits the infrared sensor 14. It is possible to prevent the infrared sensor 14 from correctly detecting the floor surface temperature and the wall surface temperature.

  In the air conditioner according to Embodiment 1, an example is shown in which the air conditioner is controlled based on the sensible temperature B. However, instead of the sensible temperature B, the room temperature, the room humidity, PMV, etc. It can be adopted as a measured value.

Embodiment 2. FIG.
The air conditioner according to the second embodiment is characterized by the operation of the wind direction adjusting device when performing the temperature adjustment off operation or the circulator operation, and the configuration of the air conditioner itself is the same as that of the first embodiment. The operation of the wind direction adjusting device will be described.
FIG. 9 is a flowchart showing the operation of the air conditioner according to Embodiment 2 during the heating operation.
FIG. 10a is a top view showing directions of the left and right wind direction plates during the temperature adjustment off operation of the air conditioner according to the second embodiment.
FIG. 10b is a side view showing the direction of the vertical airflow direction plate during the temperature adjustment off operation of the air conditioner according to Embodiment 2.
FIG. 11a is a top view showing directions of left and right wind direction plates during the circulator operation of the air conditioner according to Embodiment 2. FIG.
FIG. 11 b is a side view showing the direction of the up and down wind direction plates during the circulator operation of the air conditioner according to the second embodiment.

  Steps 1 to 5 in the flowchart in FIG. 9 are the same as those in the flowchart in FIG. 5 according to the first embodiment, and thus steps 6 and after will be described.

When the normal heating operation is started, the process proceeds to step 6, and the indoor control device determines whether or not the sensible temperature B has reached the set temperature A [° C] when the sensible temperature B [° C] is higher than the set temperature A [° C]. Determine whether. When the sensible temperature B [° C.] reaches the set temperature A [° C.] (B> A), the process proceeds to step 7 and a stop command for the compressor 32 is transmitted to the outdoor inverter control device 31 of the outdoor unit.
The outdoor inverter control device 31 receives a command from the indoor control device and stops the operation of the compressor 32.

Thereafter, the process proceeds to step 8, and the indoor control device is different from the infrared sensor 14 in that the vertical wind direction plate 17 that is the wind direction adjusting device provided at the outlet 12 is directed upward and the left and right wind direction plate 16 is different from the infrared sensor 14, as shown in FIGS. Set the wind direction in the direction. Further, the air blower 23 is operated in a light wind or stopped, and a temperature adjustment off operation is performed in which the blown air does not hit the user. The setting of the direction of the left and right wind direction plates 16 at this time is the same as that in the warm-up operation in Step 1.
This is because if the compressor 32 stops operation and the up-and-down air direction plate 17 is turned downward to increase the air volume of the blower, low-temperature air hits the user via the cold indoor heat exchanger 20 and the user feels uncomfortable. Because.

In step 9, the set temperature A [° C.] and the sensible temperature B [° C.] are compared again. If the set temperature A> the sensible temperature B, it is determined that there is a heating load, and the routine returns to step 5 to perform normal heating. Transition to driving.
If the set temperature A is not the sensible temperature B, the process proceeds to step 10 where the indoor control device detects the indoor temperature by the indoor temperature sensor 13 and the average value C [° C. of the floor or wall surface temperature by the infrared sensor 14. ], The average value Ta [° C.] of the temperature near the ceiling is detected.

In step 10, the indoor control device sets the set temperature A [° C.], the sensory temperature B [° C.], the average value C [° C.] of the floor surface or wall surface temperature detected by the infrared sensor 14, and the average value of the temperature near the ceiling. Compare with Ta [° C.].
here,
When Ta−B> γ (for example, threshold γ = 2 deg),
Or
When Ta−C> γ (for example, threshold γ = 2 deg),
Or
When Ta-A> γ (for example, threshold γ = 2 deg),
The indoor control device determines that the overhead air is high with respect to the user's perceived temperature B [° C.] or the ambient temperature environment of the user and proceeds to step 11 to perform the circulator operation for a predetermined time.

In the circulator operation, as shown in FIGS. 11 a and 11 b, the vertical wind direction plate 17 of the indoor unit 10 is set upward, and at least the left and right wind direction plate unit 16 b on the infrared sensor 14 side is set in a different direction from the infrared sensor 14. The other left and right wind direction plate unit 16a is set in a direction facing the front of the indoor unit 10.
Further, the circulator operation is performed in which the air volume of the blown air is increased from the temperature control off operation state by the blower 23 provided in the indoor unit 10 and the warm air accumulated overhead (near the ceiling) is moved to the floor surface.
When the circulator operation is performed for a predetermined time, the process returns to step 9 to determine whether or not the condition of Ta-B> γ, Ta-C> γ, or Ta-A> γ is satisfied.

  If the condition Ta-B> γ or Ta-C> γ or Ta-A> γ is not satisfied in step 10, the process returns to step 7 and the temperature adjustment off operation is continued.

  Here, when the amount of increase in the air volume of the blower device 23 is maximized in order to quickly move the warm air above the floor in the circulator operation, the user is given a feeling of airflow (when the airflow is felt, the user feels cold) Conversely, it may make you feel uncomfortable.

In addition, since the operation state before the circulator operation is a temperature control off operation, and the blower device 23 is in a light wind operation or is in a stopped state with low operation noise, the air volume when performing the circulator operation is set to the intermediate air volume. And suppress the increase of noise. The intermediate air volume is, for example, an air volume having a noise level of 40 [dBA] or less, which is generally referred to as a daytime level in a library or a quiet residential area, to avoid a sudden increase in noise.
This noise level refers to noise at a point 0.8 m below the center position of the indoor unit 10 and 1 m away in the horizontal direction.

In addition, regarding the circulator operation, when the sensible temperature B does not reach the set temperature A, the user may feel a decrease in temperature.
Therefore, when the circulator operation is performed during the heating operation, the sensation temperature B reaches the set temperature A set by the user, and the average value Ta of the temperature near the ceiling is the set temperature A, the sensation temperature B, or the floor where the user is located. Compared with the surface temperature or the average value C of the wall surface temperature, by setting the temperature difference to a certain threshold value γ [deg] or more (for example, γ = 2 deg), the user can avoid the feeling of cold wind.

  In addition, by operating the blower at an intermediate wind speed that increases the air volume up to a level of 40 [dBA] or less, the circulator operation is performed not only with the air flow but also without discomfort due to the increased noise level. And warm air above the head can be moved to the floor.

  In the air conditioner according to Embodiment 2, when the temperature adjustment off operation and the circulator operation are performed during the heating operation by controlling the air direction adjusting device in this way, the vertical air direction plate 17 provided at the outlet 12 is directed upward. The left and right wind direction plates 16 are set to direct the wind direction in a direction different from that of the infrared sensor 14, pass through the indoor heat exchanger 20, and conditioned air having a temperature higher than room temperature rises in the light wind operation and hits the infrared sensor 14. It is possible to prevent the infrared sensor 14 from correctly detecting the floor surface temperature and the wall surface temperature.

Embodiment 3 FIG.
The air conditioner according to the third embodiment is characterized by the operation of the wind direction adjusting device when performing the internal drying operation during the cooling operation, and the configuration of the air conditioner itself is the same as that of the first embodiment. The operation of the wind direction adjusting device will be described.
FIG. 12 is a flowchart showing the operation of the air conditioner according to Embodiment 3 during the cooling operation.
FIG. 13a is a top view showing directions of the left and right wind direction plates during the warm-up operation and the normal cooling operation of the air conditioner according to the third embodiment.
FIG. 13b is a side view showing the direction of the vertical airflow direction plate during the warm-up operation and the normal cooling operation of the air conditioner according to Embodiment 3.
FIG. 14a is a top view showing the directions of the left and right wind direction plates during the internal drying operation of the air conditioner according to Embodiment 3.
FIG. 14 b is a side view showing the direction of the up and down wind direction plates during the internal drying operation of the air conditioner according to Embodiment 3.

  The user determines the set temperature A of the indoor space using an operation content setting means such as a remote controller (not shown), transmits it to the indoor unit 10, and starts the operation (set the set temperature A to 24 ° C., for example). .

When the cooling operation is started, the indoor control device turns the up-and-down air direction plate 17 provided at the outlet 12 upward in step 1 in FIG. 12 as shown in FIGS. 13a and 13b (an angle at which the air flow does not hit the infrared sensor 14). In addition to setting, the wind direction is directed to the left and right wind direction plates 16 according to the user's remote control setting information, and the indoor temperature sensor 13 detects the indoor temperature of the indoor space.
At this time, the blower 23 performs a warm-up operation of the indoor heat exchanger 20 by stopping or performing a light wind operation.
In the cooling operation, unlike the heating operation, the air blown out is lower than the room temperature in the warm-up operation. Therefore, unless the up-and-down airflow direction plate 17 is blown upward toward the infrared sensor 14 provided in front of the air outlet 12, the infrared sensor 14 There is no direct wind.

  Next, in step 2, the indoor control device calculates a sensation temperature B felt by the user based on the indoor temperature, the floor surface temperature, and the wall surface temperature detected by the indoor temperature sensor 13 and the infrared sensor 14, and the indoor unit 10 Compare with set temperature A.

  Here, for example, when the set temperature A = 24 ° C. and B = experience temperature 23 ° C., it is determined that there is no cooling load, and the compressor 32 is not driven, and the process returns to step 1 and the vertical wind direction plate 17 faces upward (infrared The air blower 23 is stopped or operated in a light wind operation while the left and right wind direction plates 16 are set to the wind direction according to the user's remote control setting information.

Further, in the case where the difference between the set temperature A and the sensible temperature B is the set temperature A <the sensible temperature B as in the example shown here (set temperature A = 24 ° C., sensible temperature B = 30 ° C.), the cooling load Is determined to exist, the process proceeds to step 3 to drive the compressor 32 and operate the air conditioner.
Proceeding to step 4, as the normal cooling operation, as shown in FIGS. 13a and 13b, the direction of the vertical wind direction plate 17 is set upward (the angle at which the air current does not hit the infrared sensor 14), and the left and right wind direction plates 16 are set by the user. A normal cooling operation is performed by increasing the air volume of the blower 23 toward an angle that is set and specified by the indoor control device (for example, automatic operation or rightward setting).
At this time, the outdoor inverter control device 31 of the air conditioner performs the cooling operation by adjusting the frequency of the compressor 32 while varying the frequency so that the sensible temperature B [° C.] becomes the set temperature A [° C.].

Next, the process proceeds to step 5 where it is determined whether or not there is an operation stop request based on an instruction from the user's remote controller.
When there is no operation stop request, the process returns to step 4 to continue the normal cooling operation.
If there is an operation stop request, the process proceeds to step 6 to determine whether there is an internal drying operation setting.
If the internal drying operation is set in step 6, the process proceeds to step 7 and the internal drying operation is performed for a predetermined time. If the internal drying operation is not set, the process proceeds to step 9 and the operation of the air conditioner is stopped.

  In the internal drying operation, condensed water adheres to the indoor heat exchanger 20 during the cooling operation, and the interior of the indoor unit 10 becomes humid and an environment in which mold tends to propagate. To do later.

  When this internal drying operation is set, after the cooling operation stop command, the refrigerant circuit is changed from the cooling circuit to the heating circuit using the four-way valve provided in the outdoor unit 30, and the weak heating operation is performed. Then, the interior of the indoor unit 10 is dried.

  In the internal drying operation, since warm air is emitted from the air outlet 12 by the weak heating operation, there is an inconvenience that the indoor temperature is raised after the indoor temperature is lowered by the cooling operation. In order to suppress this inconvenience, the up-and-down air direction plate 17 during the internal drying operation is set upward from the angle of the up-and-down air direction plate 17 during the normal cooling operation as shown in FIGS. 14a and 14b. The rise in the room temperature is suppressed by setting the short cycle to be sucked into the suction port 11 again.

  When the short cycle is set, the right and left wind direction plate unit 16b on the infrared sensor 14 side of the left and right wind direction plate 16 is placed in a direction different from that of the infrared sensor 14 in order to prevent the blown air during the weak heating operation from directly hitting the infrared sensor 14. The left and right wind direction plate units 16a are directed to the front to form a short-cycle air flow to perform the indoor drying operation. The air blower 23 performs a light wind operation.

Proceeding to step 8, it is determined whether or not the internal drying operation has been performed for a predetermined time.
If the predetermined time has elapsed, the process proceeds to step 9 to stop the operation of the air conditioner.

  In the air conditioner according to Embodiment 3, when the internal drying operation is performed after the cooling operation is completed by controlling the air direction adjusting device in this way, the vertical air direction plate 17 provided at the air outlet 12 is directed upward, and the left and right air directions are By setting the plate 16 to direct the wind direction in a direction different from that of the infrared sensor 14, the conditioned air having a temperature higher than the room temperature rises in the light wind operation through the indoor heat exchanger 20, and hits the infrared sensor 14 by hitting the infrared sensor 14. 14 can prevent the floor temperature and the wall surface temperature from being correctly detected.

  Further, in the wind direction adjusting apparatus described in the first to third embodiments, the right and left wind direction plates 16 on the side of the infrared sensor 14 are directed in a different direction from the infrared sensor so as not to apply the blown air directly to the protruding infrared sensor 14. Thus, although the blown air is prevented from directly hitting the infrared sensor 14, the vertical wind direction plate 17 can be divided into left and right when viewed from the front of the air conditioner, and can be blown in different vertical directions on the left side and the right side. When the infrared sensor 14 detects that there is no person on the infrared sensor 14 side, the same effect as in the first to third embodiments can be obtained by lowering the vertical wind direction plate on the infrared sensor 14 side. Can do.

  In the first to third embodiments, the infrared sensor 14 is installed at one end or the center of the front lower panel 15a. However, air blown from the air outlet 12 such as a side surface in the left-right direction of the air outlet 12 hits the infrared sensor 14. The same effects as in the above embodiments can also be obtained at the place.

  DESCRIPTION OF SYMBOLS 10 Indoor unit, 11 Air inlet, 12 Air outlet, 13 Indoor temperature sensor, 14 Infrared sensor, 15 Bottom panel, 15a Front lower panel, 16 Left and right wind direction plate, 16a Left and right wind direction plate unit, 16b Left and right wind direction plate unit, 17 Up and down wind direction Plate, 17a Vertical wind direction plate, 17b Vertical wind direction plate, 17c Vertical wind direction plate, 17d Vertical wind direction plate, 18 Plug, 19 Air passage, 20 Indoor heat exchanger, 21 Tube temperature sensor, 22 Air filter, 23 Air blower, 30 Outdoor Machine, 31 outdoor inverter control device, 32 compressor, 33 outdoor temperature sensor, 34 outdoor heat exchanger, 35 outdoor blower, 40 cable, A set temperature, B sensory temperature.

Claims (10)

An indoor heat exchanger that generates conditioned air, a blower that supplies room air to the indoor heat exchanger, an infrared sensor that is provided on the side of the conditioned air outlet, and a horizontal air outlet that is provided at the outlet. An air conditioner having a left and right wind direction plate for adjusting a wind direction in a direction, a vertical wind direction plate for adjusting a wind direction in a vertical direction, and a control device for controlling a rotation angle of the left and right wind direction plates and the vertical wind direction plate. And
The controller controls the left and right airflow direction plates so that the airflow of the conditioned air does not hit the infrared sensor when the airflow of the conditioned air rotates to an upward position toward the infrared sensor. An air conditioner that performs airflow avoidance control that rotates in a first direction different from a sensor direction.   The air conditioner according to claim 1, wherein the infrared sensor is disposed so as to protrude from a housing panel in which the air outlet is opened. The left and right wind direction plates are provided as a plurality of left and right wind direction plate units that are divided in the horizontal direction and in which the plurality of left and right wind direction plates rotate in the same direction,
The left and right wind direction plate units arranged at the shortest distance from the infrared sensor among the plurality of left and right wind direction plate units during the airflow avoidance control rotate in the first direction. 2. The air conditioner according to 2.   The air conditioner according to any one of claims 1 to 3, wherein the airflow avoidance control is executed under an operating condition in which the conditioned air is at a higher temperature than the room air.   The air according to any one of claims 1 to 4, wherein the airflow avoidance control is executed in a heating operation mode and in a light wind operation in which the air blower has a smaller air volume than a normal operation. Harmony machine.   The air conditioner according to any one of claims 1 to 5, wherein the airflow avoidance control is executed during a warm-up operation when the heating operation is started.   The air conditioner according to any one of claims 1 to 5, wherein the airflow avoidance control is executed during a defrosting operation on the outdoor heat exchanger.   The air conditioner according to any one of claims 1 to 5, wherein the airflow avoidance control is executed during a temperature adjustment off operation during a heating operation.   The air conditioner according to any one of claims 1 to 5, wherein the airflow avoidance control is executed during a circulator operation during a heating operation.   The air conditioner according to any one of claims 1 to 5, wherein the airflow avoidance control is executed during an internal drying operation after the cooling operation is completed.

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